1312440432220 has 24 divisors (see below), whose sum is σ = 2756212868304. Its totient is φ = 524959418496.

The previous prime is 1312440432179. The next prime is 1312440432227. The reversal of 1312440432220 is 222340442131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312440432227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 394902 + ... + 1667581.

It is an arithmetic number, because the mean of its divisors is an integer number (114842202846).

Almost surely, 2^{1312440432220} is an apocalyptic number.

1312440432220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312440432220 is an abundant number, since it is smaller than the sum of its proper divisors (1443772436084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1312440432220 is a wasteful number, since it uses less digits than its factorization.

1312440432220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2094309 (or 2094307 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 1312440432220 its reverse (222340442131), we get a palindrome (1534780874351).

The spelling of 1312440432220 in words is "one trillion, three hundred twelve billion, four hundred forty million, four hundred thirty-two thousand, two hundred twenty".